Other enemies of Israel: the Houthis in Yemen and Syrian and Iraqi armed groups. Most supported by Iran. More broadly, practically the entire Islamic world (civilians) despises the actions of the state of Israel, especially with the events in Gaza. It is to be expected that in the event of war there will be legions of foreign mercenaries/volunteers making up both sides. Those who support the Lebanese and Palestinians would come mainly from the Islamic world (which has 1.3 billion people), and those who support Israel would come mainly supported and financed by the US and Western democracies. Exploring topics such as battle terrain, supporting countries, numbers, technologies, costs, etc. is something we can do better during the conflict.